"If we grant autonomy to Donbas, as Russia wants it, this may threaten to federalize, weaken and divide Ukraine. That is what Russia strives for. This will legitimize Russia's protectorate in Donbas. Afterwards, Kremlin's strategy will be to shove this protectorate - as the Trojan horse - back to Ukraine",Klimkin said.

He believes, restoration peace in Donbas requires complete ceasefire, weapons withdrawal and the OSCE observers' right to monitor the whole territory and part of the border with Russia.